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package kotionokyurievna.gmail.com.threadjoinvolatile.logic;

/**
 *
 * @author Kateryna_Reznik
 */
public interface Calculator {
    public double add( double a, double b );
    public double sub( double a, double b );
    public double mult( double a, double b );
    public double div( double a, double b );
}
